Sheetsxsheet i



April 21, 1953 H. J. MOC. BURDICK PROJECTABLEI NOZZLE LAWN SPRINKLER 2 SHEETSSHEET 1 Original Filed July 25, 1949 I (III/[$111,542 62 Reissued Apr. 21, 1953 .MUNITED sures PATIENT. OFFICE Original-No. 2,611,644, datedSeptember 23, 1952', Serial No. 106,688, July 25, 1949. Application for reissue December 1, 1952, Serial No. 323,526 20' Claims." '(01. 2'99' 61) Matter enclosed in heavy brackets ['1 appears in the, original patent but forms no part of this reissue specification; matter prlnted in italics indicates the additions, made by reissue.

This invention relates to lawn sprinklers of the type in which the sprinkler nozzles not only are caused to rotate by the pressure of the stream of water discharging therefrom, but in which the, nozzles are by the pressure of the flowin water advanced to a position at or above the surroundin ground level, while the major portion of the device remains below the ground level. In such devices one of the most difficult problems is so to'design a sprinkler head that little soil or other foreign matter will enter th device during and'between operations thereof, as when moving the mechanism from the casing.

With a view to solve this serious problem, it is the general object of my invention to provide a sprinkler head of the type referred to in which the nozzles and all the mechanisms connected therewith is seated within, and removable from a casing which remains permanently fixed in the ground to form a guard resisting entrance of soil and grit into the sprinkler mechanism.

A further object of the invention is to provide a device including such casing from which the sprinkler mechanism may be quickly and easily removed as a single unit or in complementary sub-units without disturbing the position of the casing. Another object is to provide a sprinkler mechanism in which every part is readily accessible for cleaning or replacement.

It is a further object of the invention to provide a sprinkler mechanism in which i provided means for preventing back flow of water the moment the water supply is turned off. Another object is to provide means whereby flow of water through any particular sprinkler head of an irrigating system may be adiusted to equalize the flow of water through all the nozzles f the system or entirely out off. This is of particular importance Where the ground to be irrigated is uneven or sloping and the sprinkler heads for this reason are set at different elevations. Another object is to provide a sprinkler in which the heads will recede into the casing the moment the Water is turned off even in cases where the sprinkler heads are tilted to conform to the angle of inclination of the ground surface. A still further object is to provide a sprinkler head which is designed and constructed to prevent breakage of parts thereof in case the movement of the nozzles should be checked due to seizing or sticking of supporting parts thereof.

With these and other objects in view the invention resides in combinations hereinafter described in detail'and reference is invited to the accompanying drawings in which a Preferred form of the invention is illustrated.

2 In the drawings: I f

Fig. 1 is a side elevational view of the device of my invention as it appears when seated in the ground, as in practice;

Fig. 2 is a cross-sectional view of the device itself, on a larger scale and with some of the inner portions thereof only partly in section in ordermore clearly to illustrate important features thereof;

Fig. 3 is a substantially corresponding plan view of the device with a portion of the cover thereof broken away for the sake of clearness; Fig. 4 shows the inner mechanism of the device as'it appears when removed. from the outer casing thereof; and

Fig. 5 is a bottom view of the mechanism shown in Fig. 4.

The device of my invention, in the form illustrated in the drawings, includes a cylindrical casing I terminating at the bottom of an internally threaded shoulder portion 2, by means of which the casing may be mounted in position on a pipe 3 forming part of an irrigation pipe system. The upper portion 4 of the casing is somewhat larger in diameter than the central part thereof, in order to provide within the easing an annular surface 5 of a size to receive thereon a circular partition 6 which is designed to form a water-tight closure between the space 8 above and the chamber 9 below the plate. The manner in which this plate is clamped in position will be hereinafter fully described. At the present moment, it should be sufficient to point out that the partition includes a downwardly directed sleeve 1 which forms a guide for correctly seating this part. The casing is proportioned as above described, in order to receive therein the rotatable and axially movable nozzle head assembly of the invention. This assembly is, as best indicated in Fig. 3, fitted at the top with a circular plate [0, the outer rim ll of which is shown downwardly and inwardly tapered to ride on a beveled seat l2 within the top rim of the upper casing portion 4. The central part of this plate is shown downwardly extended to form a pendent boss 13, to the bottom surface of which is rigidly secured a hollow, cylindrical nozzle support member [4. As best shown in Fig. 2, this member has, in the bottom wall thereof, a central threaded perforation I5. of a size to receive therein a tubular member I6 which, for convenience of description, hereinafter sometimes is referred to as the riser of th nozzle head assembly.

Co-axial with and snugly fitted for rotatory as well as axial movement within the central chamtion, aseby meansiotanseries'of boltssnt From project radially from the outer suriaceeoiiftliisfi membenandthey. are-laterally linclinedcrlcurvedl to form with. the member the;:rotonassembly of... the device. Axian'y rising tlirougl'i'tlierotor assembly is a stub shaft 34- and this shaft is rigidly maintained clamped in positionwithinlthelmemberiby means of. a. nut 35 (engaging, thelthreaded endeotlthe lshait. Inc-the upper encthfitheeshait is a coaxial shaft 29 seated toilfotateaandritissecured. within a the boss. 2L Algeart. pinion; 36'

is'rigidly securedito the,sha ft..34 andiit is threugh a 'conventional .train of planetaryf. speed. reducing. gears it]; operatively. connectediwith a. gear 3I8-fof the'shaft 29; near the top thereofgtdrotatethe. boss- 2 4,-.theriserll Glandv thenozzle lieadi'assembl'y' at extremely slow speed; 30

From. thelforegoingabrif descriptlon',.it shou'ld bet clearv to anyone familiar with". the. art that the. entire. sprinkleiz. head: assembly. i'se-free. to rotate and to rise axially within thegcasingl- It tol-lowsrthat, .when.thematenfieturnedlon inlthe irrigation pipe system, pressure oftthetwaterwlll force. the.=-assembly. upward,.. thereby..- m. unseat the=.valve .3I .and'..to..a]low .the waterto flow. past. thervanes 3,3 ofithecrotorlwhicha bathe: pressure or the. onrushingwater is.:causedlto.ro.tate;.and

quickly. to,.;attain v highwsneed of. rotation; The rising water. passes -through...ar-seris lipassases. 40., through the.w overhan in peripheral flan es or?the,.toprandbottomplates 211,121,. Itomwh'ence it flows throughlepenings 4iiin the lwallllofl'the,

risen] 6, to flow through the'lattenintorthe nozzle:v support-'-membere I 45. finallyto discharge through. nozzles, 43. Theuwaten pressure continues to; elevate the sprinkled heads until a part; of

theetransmissionlassembly or; the;v screen.. 4

movesmm contaettwith .aapcrtion. .ot'ith'e; part1: time... 6,; by. friction. to. maintain-the. cylindrical gearlcontainertuntumedtdnringgsnrinkling"opera ations. Should, however, .inltheecourse. of..tilne enoughioreign matter .find its:;way intdthecast ing to settle be1ow-the;nozzle supporti- Miami. in. the bearing. wbetweenuzhei.partition. .6 .L aniithe' member [6 to. retard or stop rotatiom of? the nozzle assembly, 7 then. the.-pressur.e exertedliby theimpeller member throughthe reductionlg'ears against. the. gears containen. will; cause the -con-. tainer to: rotate"v The=pressure,.\whicl'l otherwise might be suificient tolshearlthe cotterlkey-t25.or-; otherwiseto damagetthemmechanismis thereby relieved.

IttiSJlOtlCGd that ithemppers: end of .thexriser. L6 istclosed by aavalve- 5Z.. whichlmust .-be-..raised from-its-seat in-lorder towprovide freespassage for the water to thenozzlesinthe mannerawhich' will-be hereinafter describedinndetail.

NotcheseM', 45tare sunkflintotthe periphery: of. the topplate: inandthey, are limaccordance. with present day sprinkler practice, proportioned. evenlytc. distribute s the spray, oven1the. .sp aeeto be irrlgated... TovillustrateathisimportantpoMh 5 the notch 44 is relatively shallow and is placed in axial alignment with the passage through the nozzle 43. The notch 45 is out much deeper and atslot iszcutinto the uppencorner'ofithe nozzle Mate provideaiupwandly directed outlet for Water discharging through the nozzle. The result being that some of the discharging water rises through the inner portion of the notch 45 oir a" shortercurve to irrigate the area nearer the.snritckier:head' whereas the water discharging axially through the nozzle 43 passes on a lngenpfiatter eurve to the outer portions of the area.-

It"'ls"believed that the foregoing description of the-eoperation of the device should be sufficient to enable. one conversant with the art. toldesign andllconstructitlie-device ofth'e invention; In addition, it should be' mentionedthatj' according to present day engineering practice, means shouldberembodied for screeningout. allgrit and other .ioreign. substances. from the. water before itjfiows into the. nozzles. Illustrative otsuch' means. Lhave shown: a conicall'y, shaped. screen 48...-rising,., from the. top. plate 210 of? the rotor. to. pendent.sIeeveT-ofthe plates? It'may also beidund' advantageous. to place a' sealing" ring 49, on the riser li'to contact the Junder surface oi? this plate; when the :1 nozzle headii'assembly reaches its uppermost position-during -irrigation; operations, so to. form a: water seal betweenth'e chamber 81 'and the space within the nozzlesup? portj. 14'.

Experience has taught me 'tliatfirrcaseswh ere sprinkler heads areplacedf at different elevations, asrequiredto irrigate unevenonsldpinggroundj once the. supply has; been turnedbrrj; :the-zwater remaining. in thehigher" portions: entire; system will-.ilowtbaclithrou h the sprinkler heads atth'e lowerl'portion-oifthe system .to 'form poollsfor tolcause soil' erosion. about these; lower sprinkler heads. A1so..that'a considerable amoimtiotfrnore or. less gritty. .soil'. becomes stirred up; in these I1.( o1s,..gradually to .settle within the sprinkler heads; often. to: cause considerable" damage therein,

Thiscondition is often so serious that;it'b'e= comes ,necessaryfto remove. the, entire sprinkler headlfoncleaninggaiter-eachirrigation'. Inxorder tdprevent such' occurrences. and'jso. as toelimi nate frequently recurring,cleaninggoperations, .I hare, provided theovalvel 3] which. will". become seated .the vmoment the water; supply," is cut? off. and'lthe: sprinkler head. assembly instantly "by gravity, commences to settle. Backfiow to? all sprinkler "heads", at lower "levels? is therebrpre' vented. In'addition; IQhave. provided manually operable" means fonchecking' backfiow through the. sprinkler head of my invention. Tothisend; arecess '50 is sunk into the top plate l'llpft'h'e assembly'an'd 'a passagei5l leads from this recess through'tthebottomof the plate "and the'uppjer wall ofithemember H in axial alignment with the riser IS; A boltyiZ'is seateol'in threads of thispassage and it *is'fitted at "the bottom" thereof witha conical valve'liL A valve'seat Mus-sunk into. the, top of the riser'lfi ofla: size "to' receive this valve, thereby to che'cktbackflow" into the chamberJSJ This.valve,,,which in'Fig." 2J'is shown closed; is inorder to. prepare the deviceior the sprinklingioperation first manually elevated. sni ficiently not only: to provide. clearance. for-the risingmovement of. thev assembly butalsoetoirer mainv a sufificient di'stanceabovethe.fullytelevated assembly -to,..insure free passage for -.the.lstreamloi water flowing thmughrtheeassemhliq. Butlwhen 'the valvemanually closed, as indicated in Fig.

2 -it 'wi;ll effectively prevent backflow through even the uppermost sprinkler head. In addition, it may be found advantageous to mount an annular' fiange 55 on andaspart of the plate 6 in close proximity to the outer periphery of the nozzlesupport l4. With thisflange in place, a considerable amount of grit may gradually over -'along period of time accumulated within the space surrounding the flange before it becomes necessary to remove the assembly from the casing for cleaning.

Inthe types of projectable nozzle sprmkler heads which have come to my notice, no single nozzle assembly is provided, but each part or sub-assembly of the mechanism must be removed separately in order effectively to perform the cleaning operation. The nozzle head assembly of the present device eliminates such laborious opera .tions. When it is found necessary or advisable toclean out the upper chamber 8, it is merely required to remove the screws 59 which clamp "the top plate In in position on the nozzle support and then to remove this plate.

The partition 6 is designed for quick and convenient withdrawal to permit removal of the assembly'as a whole. To this end an annular rib -60 is made to project inwardly from the casing wall a short distance above th partition support surface 5 and a series of equidistantly spaced notches 6! are cut through this rib. The par- .tition 6 is made with similarly spaced radially directed projections 62 of a size to pass through these notches and by a slight rotation of the partition to slide, under the rib 60. In practice, a suitable spanner wrench is pushed through the top plate notches 44, 45 and caused to enter the two diametrically opposite recesses 26, 21 of the partition 8 which appear through these notches. .If none appear, it is merely required slightly to turn the top plate In and proper alignment is obtained. The wrench is then operated to move the projections 62 into registration with the notches 6|. The entire assembly may then be lifted out of the casing leaving the latter entirely open for cleaning.

It was above stated that the cotter key 25 ties the gear casing to the riser l8. Upon withdrawal of this key, the entire lower portion of the assembly may be withdrawn from the upper part thereof for removal and cleaning of the screen 48 and such further servicing as may be required. And it is important to note that, during such removal operations and until reseating is effected, the casing remains undisturbed in the ground to bar entrance therein of dirt and grit.

--From the foregoing detailed description, it is seen that I have provided a very compact and conveniently operable sprinkler head. Particularly, it is to be noted that the device, as illustrated in the drawings, is considerably lower than any other of the same type that has come to my notice. When it is considered that the depth to which it is required to dig to install the sprinkler system depends upon the height of the sprinkler head, this becomes an important feature of the invention.

While under ordinary conditions, where the sprinkler head is vertically mounted, it is found that the nozzle head assembly will instantly return to bottom valve closing position when the Water supply is turned off; it becomes necessary at times so to plan the system that the heads are tilted or even partially inverted. In such cases, it may be found advisable to place a light compression spring 65about the tubular riser Is ,to

insure -complete seating of the valve 3| while the system remains dormant. v

While I have in the foregoing described a preferred form. of. the invention, it will b understood. that I: reserve the-right to embody therein modificationsxwith the scope of the claims hereto appended. :5 i

Iclaim:

1. In a lawn sprinkler, a cylindrical casing open at the top and having at the'bot'tom a coaxial water inlet shaped to form a valve seat, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor having a valve at the bottom thereof normally in contact 'with'the valve seat of the'water inlet, a coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, and transmission gearing extending from the rotor to the nozzle support, Water pressure causing the inlet'valve to risefrom its seat simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed. 2. In a lawn sprinkler, a cylindrical casing open at the top and having at thebottom a coaxial water inlet shaped to forma valve seat, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, manually releasable means for locking the sprinkler head against removal fromthe casing, said sprinkler headcomprising, a rotor having'a valve at the bottom thereof normally in contact with the valve seat of the water inlet, a coaxial nozzle support rotatable on saidrotor but locked in position'thereon against relative axial movement, and transmission gearing extending from the rotor to the nozzle support, water pressure causing the inlet valve to rise from its seat simultaneously to elevate the sprinkler head Within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed. i

'3. In a lawn sprinkler, a cylindrical casing open at the top and having at the bottom a coaxial water inlet shaped to form a valve seat, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor having a valve at the bottom thereof normally in contact with the valve seat of the water inlet, a'coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, transmission gearing extending from the rotor to the nozzle support, and re 'silient means urging downward movement of the sprinkler head to seat the valve, water pressure causing the inlet valve to rise from its seat against the tension of said resilient means simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed.

4. In a lawn sprinkler, a cylindrical casing open at the top and having at the bottom a coaxial Water inlet shaped to form a valve seat, a sprinkler head seated in the casing for axial movement'therein and removable therefrom as a whole, manually releasable means for locking the sprinkler head against removal from the casing, said sprinkler head comprising, a rotor havlng'a valve at the bottom thereof normally in contact With'the valve seat of the water inlet, a coaxial whole said sprinkler having a: valve at the bottom thereof normally nozzlersupport rotatable on 'saicl rotor-but locked in position thereon against relative axial move- .ment, transmission gearing? extending? from: the .rotor .tothe nozzlesupport; water pressure causingtthe .inletvalve to :rise from its' seat simultaneously; to elevate the sprinkler: head wlthin the casing and to impart rotation to saidtzrotor thereby through said gearing to rotate the nozzle supportlat aareduced rate of speed; andz imeans tightly-enclosing said gearing, said: meansheing normally-freeto rotateWithirK-thecasingiandheld againstrotationrthereinfbmfrictional engagement with said-locking means when the -sprinkler head isaiully elevated,-

5.-Ina;-lawn sprinkler, a cylindrical casing open at the .top'- and having at the bottom: a'- co?- axial lwaten linlet shaped to form" avalve seat; a .sprinklerhead sea-ted: in the casingfor" axial movement therein and removable therefrom E as awhole, said sprinkler head comprising,- a rotor havingeasvalve at thebottom thereot normally .irncrmtactv with the-.valveeseat of thewateninlet, a; coaxial .nozzles support rotatable on: said rotor hut; locked in position thereon: against relative axialmovement-upwardly and outwardly directed 'nozzles-vseated in: said support, 1a circular plate on-thesupport-normally closing the top otthelcasing said plate having' notches in the periphery thereof in alinementwiththe nozzle axes, and transmissiongearing-extending: from the rotor to thenozzle support; water pressure causing the inlet valve to riseirom its seat simultaneously to elevate-thesprinkler head within the casing.andtodmpartmotation to said rotor therehy through saidgearingrto rotatethe nozzle .supportat a reduced-rate of-lspeed.

6I.In ailawn. sprinklerga' cylindricalcasing open atuthe top-and-having-at the bottom a coaxialllwaterinlet shaped to form a valveseat-, a

sprinkler-head seated in the casinglfor axial movement therein: andremovable therefromas a whole said sprinkler head comprising, a rotor having aNa-lve at the bottomthereof normally in contact with the valve seat of the water inlet,-a

coaxial nozzle support rotatable on said rotorbut locked in position thereon-against relative axial movement,v transmission gearing extending from thelrotor-to the nozzle support, water pressure causingtheinlet valve to risef-rom its seat simultaneously to elevate the sprinkler head within thecasing=and-to impart rotation to said rotor thereby-through said-gearing torotate the=nozzle supportat a reducedwrate of speed,- avalve seat in the nozzle support, and -a valve for said seat, said. valvebeingamanuallv operable from above the nozzle support to adjust and: entirely tor shut 011' the flow through-"the sprinkler heada 7:,In-.a--lawn sprinkler; al-cylindrical casing open/ at the'top and having atthe bottom a -coaxial water inlctshaped to form-a valvesea-t,-a sprinkler head seated in the casing for axial movement therein and removablethereirom as a head comprising,- aroto'r 8 taneouslyr to elevat'e the sprinkler head within the casing and to impart rotation-to said rotor thereby. through said gearingato=rotate the-nozzle support at a'reduced rate'ofspeeda valveseat i'n'.-said nozzle'supporh; anda- :valvefor engagemerit-with said seat, the valve' having a-threaded stemrising: therefrom seated ina threaded ap'erture of the support-for manual movementtc move the valve" to -adjust and entirely to-- shut off the flow through the sprinkler head.-

8;In' a lawn sprinkler, acylindricalcasinglopen at the top and having at the bottom aco'axial w'ater- 'inlet shaped to form a va'1ve:seat-; a sprmklen'heaa seated in the casing-jfor axial movement therein andiremovable therefrom: as a'whole.

said sprinkler head cormirising, a rotorha vingi a valve at the bottom" thereof normally'incontact with'the va ve seat of th'e' water inlet, a-=coaxial stein risingfrom the rotor; ashaft in continued axial aliriei'nent with said sten'i,- a :geanrig-id'ron the stem, algea'r" ri'gidlysecured'to the sh'aftga train of reducing g s operativelylntercormem his the two gears acoaxial nozzle sup'port riding on said shaft, and m'eans for-interlocking said support with the'said shaft; water pressure causingthe inlet "valve to rise" from its seat simultaneously to elevate the sprinkler head'withln the casing and toiinpart rotation to the rotor therebythrough said gearinig t'o rotate the noz zle support at reducedspeed.

9. In a lawn sprinkler, a cylindrical ca'sin 'g open at the top and having at the hottoma'coaxial water'inlet shaped to form a val veseat, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotoi' having a valve at thebottom'thereof normal-1y in contact with the valve seat of the water inlet, a coaxial stern rising. from the rotor, ashaftin continued axial alinement with said stem, agear rigid on the stem, a gear rigidly secured to the shaft, a train of reducing gears operatively in terconnecting the two gears, a coaxial nozzle sup port riding on said'shaft, a closure for said gears riding on said stem and shaft, and meansfor interlocking said support with the said shaft, wa ter pressure causingthe inlet valve to rise from its seat simultaneously to elevate the sprinkler head within the casing and to impartr'otation to the rotor thereby through-said gearing to rotate th'enozzl'e support at reduced'sp'eed.

10. In a lawnsprinkler, a cylindrical casing openat the top and havingat the bottom-acoaxial'water inlet-shapedto form a valve seatQa sprinkler head seated in the casingiifor axial movement therein and" removable therefrom as a Whole, said sprinkler head comprising, a rotor havinga valve at the bottom thereof normally in contact with the valve seat of the water inlet, a coaxial stemrising from the rotor, ashaftd-n continued axial alinement with said stem; a:gear rigid on the stem, a gear rigidly secured to-the shaft, a train of reducing: gears operatively inter-- connecting the two gears, a-clo'sure for 'saiwgears riding onsaid' stem and shaft, a coaxial nozzle support riding on said shaft; means fordnter locking said -support-Withthe said shaft,- water pressure causing the inlet valve to ris'edro'm its seat simultaneously 'to elevate the sprinkler head within thecasing and to impart rotation 'to'the rotor thereby through'said gearing to rotateithe nozzle support at reduced.- speed; and a screen between-l said-' clos'urle and the-rsaid n'ozzle SHD PUFE;

11. Inca -lawn sprinkler, a cylindrical casi open at the top; and havingw at the bottom a axial water inlet shaped to form' a valve seat, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor having a valve at the bottom thereof normally in contact with the valve seat of the water inlet, a coaxial stem rising from the rotor, a shaft in continued axial alinement with said stem, 3, gear rigid on the stem, a gear rigidly secured to the shaft, a train of reducing gears operatively interconnecting the two gears,a coaxial nozzle support riding on said shaft, a closure for said gears riding on said stem and shaft, means for interlocking said support with the said shaft, water pressure causing the inlet valve to rise fromits seat simultaneously to elevate the sprinkler head within the casing and to impart rotation to the rotor thereby through saidgearing to rotate the nozzle support at reduced speed, a screen between said closure and said nozzle support, and resilient means urging the sprinkler head downward to seat the inlet valve on its seat.

12. In a lawn sprinkler, a cylindrical casing open at the top and having at the bottom a coaxial water inlet, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a'whole, manually releasable means for'locking the sprinkler head against re-' moval from the casing, said sprinkler head comprising, a rotor, a coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, and transmission gearing extending from the rotor to the nozzle support, water pressure causing the sprinkler head to rise within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed.

13, In a lawn sprinkler, a cylindrical casing open at the top and havin at the bottom a coaxial water inlet, a sprinkler head seated in the casing ,for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor, a coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, transmission gearing extending from the rotor to the nozzle support, and resilient means urging downward movement of the sprinkler head to seat the valve, water pressure causing the rotor to rise against the tension of said resilient means simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed.

14. In a lawn sprinkler, a cylindrical easing open at the top and having at the bottom a coaxial water inlet, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, manually releasable means for locking the sprinkler head against removal from the casing, said sprinkler head comprising, a rotor, a coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, transmission gearing extending from the rotor to the nozzle support, water pressure causing the rotor to rise simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed, and means tightly enclosing said gearing, said means being normally free to rotate within the casing and held against rotation therein by frictional axial water inlet, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor, a coaxial nozzle support rotatable'onsaid rotor but locked in position thereon against relative axial movement, upwardlyv and'outwardly directed nozzles seated in said support, a circular plate on the support normally closing the top of the'casing, said plate having notches in the periphery thereof in alinement with the nozzle axes, and transmission gearing-:extending' from the rotor to the nozzle support, water pressure causing the rotor to rise simultaneously to"'elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the" nozzle'support at a reduced rate of speed.

16'. In a lawn sprinkler, a cylindrical casing open at'the top'and having at the bottom a coaxial water inlet, a sprinkler head seated in thecasing ,foraxial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor," a coaxial nozzle support rotatable on said rotor butlocked in position therei on against relative axial movement, transmission gearing extending from the rotor to the nozzle support, water pressure causing the rotor to rise simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed, a valve seat in the nozzle support, and a valve for said seat, said valve being manually operable from above the nozzle support to adjust and entirely to shut 017 the flow through the sprinkler head.

17. In a lawn sprinkler, a cylindrical casing open at the top and having at the bottom a coaxial water inlet, a sprinkler head seated in the casing for axial movement therein and removable therejrom as a whole, said sprinkler head comprising, a rotor, a coaxial nozzle support rotatable on said rotor but locked in position thereon against relative axial movement, upwardly and outwardly directed nozzles seated in said support, a circular plate on the support normally closing the top of the casing, said plate having notches in the periphery thereof in alinement with the nozzle axes, transmission gearing extending from the rotor to the nozzle support, water pressure causing the rotor to rise simultaneously to elevate the sprinkler head within the casing and to impart rotation to said rotor thereby through said gearing to rotate the nozzle support at a reduced rate of speed, a valve seat in said nozzle support, and a valve for engagement with said seat, the valve having a threaded stem rising therefrom seated in a threaded aperture of support for manual movement to move the valve to adjust and entirely to shut of) the flow through the sprinkler head.

18. In a lawn sprinkler, a cylindrical casing open at the top and having at the bottom a coaxial water inlet, a sprinkler head seated in the casing for axial movement therein and removable therefrom as a whole, said sprinkler head comprising, a rotor, a coaxial stem rising from the rotor, a shaft in continued axial alinement with said stem, a gear rigid on the stem, a gear rigidly secured to the shaft, a train of reducing gears operatively interconnecting the two gears,

ateoeeiaz nozzle sappart riaiugm 'saidvxlyajt;

and means for interlockinmsaiclsupport. withn-the;

sgdzzshait, water pressure causing the rotor to rite simultaneously: to elevate;- the .sprinkler head, within: the. easingand .to impartamtatian -.to' the mtrzfltereby thmughsaid .gearingto rotatemthe.

nazele support; .at- :rteduced.-..speed.

1-9., amen. lawn.;spri.nlaler, a cylindrical: waging. pm-latzthe. top and; :hauingeat; thetbottomca 100.-

amialmater inlet, a.;:sprinlcler head. seatedmln'the: casing.;:for axial mevement therein. and. remau able; :thetefimm 118:0. whole, said. sprinkler head:

cgmpnisina, ya mtmgjal .coaxz'al stem: rising from mtor asshaft in. continued axial alinement m a rigidly-.- securedi to. the; shatt, entrain. ofreducing gesmcopemtiveln intezzeonnectinggme :tiwq. yeans,

a .c-paaxial muzzle support riding on tsaid. shait, melasute ionxsaid gears. riding Unsaid stem. 'anll shfli ti aand meansdoz inter-melting. said support with thegaaid stunt,v wat-enpressure .causingthe rqtozio [ism-simultaneously.;to.;;elevate thesprin- Islet heart-withinmthe casingx.-and.:to-.impart rota,

tizm t0 the. zrotorwthereby. .thmugh -.said gearing. teqcetateathe .nozzle. support-lat .nednced,speedz .tzmlnaaulawn .spztinkler, a; cylindrical. casing open 41 .thettop.:andwhnuingntthe bottom .a co=- am: .water :inlet, .a+spninlcler head seated in .the

ca sing for, .amial. :mormentr;thenein able therefrom as a wnoleasald sprinkler comprising; a rotor, a.coaazialetem'zrisinaztr m, the rotm', .-.a v.ehaft ineentinuedrnxial.aalinementz witnsaia. stem, at aea.r.- rigid the; em; amen rigidly. secured to. the :,8hGft;.-fl;i flin gears ,o'pemtively, interconnectiny thee we mean... a cnazuial nozzle enmm riding :m'd. shefl; a-=cl0sme for.saidaeaxs-ariding mias em m shafLrmeans-jorinterlockingiefli desunfiwii the .saidshaft; water mnessurewmi gc fihfinmiflf' to rise ..-simultaneouslu. ta elevate: thesmink er head :withinmhezca-sing. and to impar .w atm' tontnerroter .therebathmuahxeaid;near n t. tale-me mOaale sumnortat min ed an screen'gbetween said;,-c.lqsnz .:.md. aaid: support.

sliefe enn s Cited... ll-1 6 me. 1. h s tm n .011 the-original, .natent UNITED STATES (PATENTS Na e. Date Garban ni. Aug, 8/1923 A r- .8, .1939; Apr- 12.. 932;

Numbe iii] 

